178,404 research outputs found
DOUBLE PRESSING FOR PORCELAIN STONEWARE TILES: AN EXPLORATORY ANALYSIS
No full textDouble pressing systems have recently been introduced to speed up and improve the pressing step of porcelain stoneware tiles. In this paper, double pressing systems using discontinuous pre-compaction are analysed, both technically and economically. Two operative conditions are considered: the traditional forming of tiles during pressing is compared with the innovative production of a unique large-sized slab, subsequently customized according to market requirements. Furthermore, manufacturing conditions are explored with infrequent or frequent production runs, due to increasingly smaller production batches, in order to evaluate which production process is more suitable when changing operative conditions are managed.The analysis is carried out experimentally, by collecting data in existing pilot plants, producing batches of products of different size and colour. Details are provided concerning the technical characteristics of the systems, along with costs per manufactured square metre for investments, personnel, maintenance, spare parts and electric power. A case in which some production days are reserved for each manufactured batch is compared to a case in which production runs are repeated more frequently in a day.Manufacturing large-sized slabs and customization has shown to be an efficient solution for companies operating in changing markets. Further research should study double pressing systems using continuous pre-compaction. The proposed analysis, by presenting an evaluation process and sharing data collected experimentally, provides innovative support for addressing decision makers when new pressing systems for porcelain stoneware tiles are selected
Multi-criteria decision making approaches applied to waste electrical and electronic equipment (WEEE): A comprehensive literature review
No full textThe global demand for electrical and electronic equipment has undergone continuous growth in recent years due to the effect of industrialization and technological development. This indicates substantial quantities of e-waste that need to be managed properly to reduce their environmental impact and to avoid inappropriate forms of disposal. The purpose of this paper is to review the most popular multi-criteria decision-making approaches applied to the management of waste electrical and electronic equipment, analyzing how they are used to contribute to the improvement of management strategies along the entire supply chain. For this purpose, a methodological protocol for the collection, selection, and analysis of the scientific literature was applied, identifying 44 papers on which to conduct this study. The results showed that numerous authors have developed multi-criteria approaches, with particular attention to recycling phase. The analytic hierarchy process is the most widespread multi-criteria approach, often coupled with VIKOR, DELPHI, and TOPSIS methods. The numerous decision making criteria adopted cover different reference dimensions: environmental, economic, social, technical, and legal. Considering environmental aspects also in decision making processes means enhancing the relevance of this dimension, as well as encouraging practices that reduce the impact of toxic substances on the environment and living organisms
The Potential of Hydrogen Technologies for Low-Carbon Mobility in the Urban-Industrial Symbiosis Approach
No full textThe use of green hydrogen to power vehicles is recognized as contributing to the mitigation of the greenhouse gas (GHG) emissions responsible for climate change. On the other hand, the need for reducing GHG emissions is even more urgent in densely industrialized areas, traditionally located nearby highly populated zones. In these areas, road transportation is a relevant source of environmental pressures affecting air quality and the nearby communities’ health: in Europe, private vehicles, vans, trucks, and buses produce more than 70% of the overall greenhouse gas emissions from transport, as well as particulate matter and nitrogen oxide. The European Hydrogen Strategy considers using green hydrogen as an energy carrier to de-carbonize industry and the transport sector, highlighting the need for the infrastructure to produce, store, and distribute hydrogen. The spatial configuration of the industrial sites and the existing infrastructure can facilitate the creation of hydrogen hubs serving both the logistics needs of companies and the public and private mobility in an urban-industrial symbiosis approach. Thus, this study aims at investigating the opportunities offered by the creation of synergies between industrial clusters and the nearby urban areas to improve the local sustainability by supporting the deploying of low-carbon mobility using green hydrogen. The available literature is reviewed in order to schematise and discuss the sustainability-related basis of adopting such a strategy, presenting an updated analysis of the latest research and application results suitable for future research applications and for supporting decision-making processes
LA REVERSE LOGISTICS PER L'ABBIGLIAMENTO
No full textI prodotti del sistema moda (vestiti, accessori,...) sono da sempre caratterizzati da un’estrema volatilità delle vendite, che si traduce in un numero significativo di articoli invenduti al termine della stagione. In questo articolo si presenta un magazzino, che, gestendo in maniera efficace ed efficiente la raccolta dei resi di stagione, ha consentito di trasformare una voce di costo in un’occasione diprofitto per l’azienda
Saggi di glottologia generale comparata. 2: I numerali. Memoria presentata il 1. febbraio 1908 ...
No full textBologna : Gamberini e Parmeggiani, 1909-1913
Estr. da: Memorie della R. Accademia delle scienze dell\u27Istituto di Bologna, classe di scienze morali, sez. storico-filologica, ser. 1, tomo 3., 1908-09
Managing lumpy demand for aircraft spare parts
No full textThis paper deals with effective forecasting methods for typically lumpy demand for aircraft spare parts, and analyzes the behavior of forecasting techniques when dealing with lumpy demand. Twenty forecasting techniques are considered and tested and historical data from Alitalia are used to analyze and compare their performance. The results demonstrate that item lumpiness is the dominant parameter and show that demand forecasting for lumpy items is a complex problem; results from previous studies are not very accurate. The best approaches are found to be weighted moving averages, the Croston method, and exponentially weighted moving average models
La necessità di uno stemma interlinguistico: il caso della Navigatio Brendani
No full textLe tradizioni di molti testi bassomedievali ad ampia diffusione sia in latino che in traduzioni vernacolari pongono complessi problemi agli editori: idealmente, l’edizione di ciascuna delle forme esistenti dovrebbe basarsi anche su una conoscenza esatta della tradizione delle altre forme, a partire da quella latina di partenza. Sono presentati casi che ben mostrano i limiti di studi che non abbiano potuto poggiare su una base solida da questo punto di vista e allo stesso tempo le potenzialità di un approccio interlinguistico: l’Elucidarium di Onorio Augustodunense, la Visio Tnugdali e soprattutto la Navigatio Brendani. L’esame parallelo della tradizione latina e dei volgarizzamenti risulta fondamentale in entrambe le direzioni: da un lato permette di collocare le versioni vernacolari in rapporto allo stemma latino, chiarendo quale esattamente fosse la Vorlage dei traduttori; dall’altro illumina tratti dello stemma latino stesso e elementi di storia e geografia della tradizione che altrimenti sarebbero sfuggiti all’editore.The traditions of many medieval texts, widespread both in Latin and in vernacular translations, pose complex problems to philologists: ideally, the edition of each of the existing forms should also be based on an exact knowledge of the tradition of every other form, starting from the underlying Latin one. This paper presents cases showing the limitations of studies that could not rest on such a solid basis and at the same time the potential of an interlinguistic approach: the Elucidarium of Honorius Augustodunensis, the Visio Tnugdali and primarily the Navigatio Brendani. The parallel examination of Latin tradition and vernacular translations proves to be fundamental in both directions: it allows the vernacular versions to be placed in relation to the Latin stemma codicum, clarifying which exactly was the Vorlage of the translators; furtermore, it highlights segments of the Latin stemma itself, as well as historical and geographical points of the tradition that would otherwise have escaped the philologist
Leonardo Bruni traduttore militante : echi della polemica anti-signorile nei Politicorum libri octo
No full text- …
